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As stated in the table, the detector has a 100um pixel pitch and can be configured in 5 different gain modes; 3 fixed gain modes and 2 auto-ranging gain modes. As with the other members of the ePix family of detectors, the analogue chain consists of a CSA with a switched reset scheme, a 1st order low pass filter, and a correlated double sampler. The CSA has been designed with the option to vary the feedback capacitance of the CSA, effectively changing the gain of the system.
Figure 3. Analogue channel layout for the ePixHR5kHz pixel.
The pixel array size for the detector is 192x144. Figure 2 show a depiction of the ASIC layout with core blocks highlighted.
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In order to facilitate the high framerate the number of ADC boards at the edge of the ASIC was increased, giving raise to the balcony seen in both Figures 1 and 2. The structure of the analog channel for the ePixHR5kHz, with the additional optimizations done compared to the ePix10ka channel highligted, highlighted, can be seen in Figure 3.
Figure 3
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